Alice added sodium chloride to water and stirred the water for several minutes. Alice is most likely trying to demonstrate that
ionic compounds
1. are hard.
2. can dissolve.
3. are clear.
4. can melt.
1. are hard.
2. can dissolve.
3. are clear.
4. can melt.
1 answer:
Answer:
2. can dissolve.
Explanation:
Ionic compounds are compound that have a positive charge and a negative charge. The compound have cations and anions. Base on the question sodium chloride is an Ionic compound . The sodium produces the cation ions (Na+) while the chlorine produces the anions (Cl-). Generally, ionic compound has a strong bond.
Stirring sodium chloride in water, Alice is most likely to demonstrate the ability of ionic compound to dissolve in water. Ionic compounds dissolves in polar solvent like water. The opposite charge present in the ionic compound are usually dissociated when they are immersed in water. The cations of sodium are surrounded by the negatively charged oxygen ion while the anions of chlorine are surrounded by the positively charged hydrogen ion. The water molecules surround the ions available in the ionic compound thereby preventing it from recombining. All of the water molecules surround the ions of the ionic compound to dissolve it.
The picture above demonstrate how NaCl is dissolve in water.
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Answer:
1. 9.4 grams of methane produce<u> 25.85</u> grams of CO2
2.Grams of water produced = <u>11.81 grams</u>
3.Mass of Methane produced by 10.1 gram of O2 = <u>2.52 grams</u>
4.Amount of methane consumed = <u>46.9 grams</u>
5. Grams of Co2 produced =<u> 8.32 grams</u>
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Explanation:
Molar masses :
Methane = CH4 = mass of C + 4x (mass of H)
CH4 = 12 +4(1) = 16 grams
<u>1 mole of CH4 = 16 gram</u>
Oxygen O2 = 2 x (mass of O) = 2x(16) = 32 gram (1 mole of O2 =32 gram)
Carbon Dioxide =CO2 = mass of C + 2(mass of O)
= 12 + 2(16)
= 44 grams <u>(1 mole of CO2 = 44 gram )</u>
Water = H2O = 18 grams ( 1 mole of H2O = 18 gram)
1 mole of each molecule is equal to their molar masses
The balanced equation is :
According to Stoichiometry :
1 mole of CH4 = 2 Mole of O2 = 1 mole of CO2 = 2 mole of H2O
1. From the equation ,
1 mole of methane produce =1 mole of CO2
16 gram of methane = 44 gram of CO2
1 gram of methane =
gram of CO2
9.4 gram of CH4 =
gram of CO2
= 25 .85 gram of CO2
2.
2 mole of O2 produces = 2 mole of H2O(water)
1 mole of O2 produces = 1 mole of H2O
32 gram of O2 = 18 gram of water
1 gram of O2 =
21 gram of O2 =
11.81 gram of water
3. 1 mole of CH4 = 2 mole of O2
16 gram of CH4 = 2(32) = 64 grams of O2
64 gram of O2 needs = 16 grams of CH4
1 gram of O2 needs =
10.1 gram of O =
of CH4
= 2.52 gram
4.
1 mole of CO2 is produced from = 1 mole of CH4
44 gram of CO2 is produced from 16 gram of CH4
1 gram CO2 =
gram of CH4
129 gram of CO2 =
gram of CH4
= 46.90 grams
5.
2 mole of O2 produce = 1 mole of CO2
2x 32 gram of O2 = 44 gram of CO2
1 gram of O2 =
of CO2
12.1 gram of O2 produce=
of CO2
= 8.318 gram
Note : Write the quantity give on left side of "="
write the substance asked on right side of "="